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Jerky Seesaw Nystagmus in Isolated Internuclear Ophthalmoplegia
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Kyungmi Oh, Jae Hong Chang, Kun Woo Park, Dae Hie Lee, Kwang Dong Choi, Ji Soo Kim
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J Korean Bal Soc. 2005;4(1):49-52.
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 Abstract
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- The authors report jerky seesaw nystagmus, extorsional downbeating in the right eye and intorsional upbeating in the left eye, in a patient with right internuclear ophthalmoplegia (INO). This pattern of nystagmus may occur by disrupting pathways from contralateral posterior and anterior semicircular canals by a lesion in the medial longitudinal fasciculus. Depending on damage to the pathways from contralateral vertical canals, various patterns of dissociated torsional-vertical nystagmus may accompany INO.
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Possible Mechanism of Seesaw Nystagmus in Internuclear Ophthalmoplegia
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Ji Soo Kim, Kwang Dong Choi, Ja Won Koo, Kyungmi Oh, Jae Hong Chang, Kun Woo Park, Dae Hie Lee, Gyu Cheol Han
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J Korean Bal Soc. 2004;3(2):413-416.
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Abstract
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- The authors report jerky seesaw nystagmus, extorsional downbeating in the ipsilesional eye and intorsional upbeating in the contralesional eye, in a patient with internuclear ophthalmoplegia (INO) from focal pontine lesion. This pattern of nystagmus may occur by disrupting pathways from contralateral posterior and anterior semicircular canals by a lesion in the medial longitudinal fasciculus. Depending on the pathways involved, various patterns of dissociated
torsional-vertical nystagmus may accompany INO.
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KBS
